package com.csust.reggie.controller;

import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
import com.baomidou.mybatisplus.extension.plugins.pagination.Page;
import com.csust.reggie.common.R;
import com.csust.reggie.domain.Category;
import com.csust.reggie.domain.Dish;
import com.csust.reggie.domain.DishFlavor;
import com.csust.reggie.dto.DishDto;
import com.csust.reggie.service.ICategoryService;
import com.csust.reggie.service.IDishFlavorService;
import com.csust.reggie.service.IDishService;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.redis.core.RedisTemplate;
import org.springframework.web.bind.annotation.*;

import java.util.List;
import java.util.concurrent.TimeUnit;
import java.util.stream.Collectors;

/**
 * @author yinweiguang
 * @date 2022-04-01 18:58
 */
@RestController
@RequestMapping("/dish")
@Slf4j
public class DishController {

    @Autowired
    private IDishService dishService;

    @Autowired
    private IDishFlavorService dishFlavorService;

    @Autowired
    private ICategoryService categoryService;

    @Autowired
    private RedisTemplate redisTemplate;


    @PostMapping
    public R<String> save(@RequestBody DishDto dishDto){
        log.info("Dish dto 新增数据： {}",dishDto.toString());
        dishService.saveWithFlavor(dishDto);
        String key = "dish_" + dishDto.getCategoryId() + "_1 ";
        redisTemplate.delete(key);
        return R.success("添加成功");
    }

    /**
     * 菜品信息分页查询
     * @param page
     * @param pageSize
     * @param name
     * @return
     */
    @GetMapping("/page")
    public R<Page> page(int page,int pageSize,String name){

        //构造分页构造器对象
        Page<Dish> pageInfo = new Page<>(page,pageSize);
        Page<DishDto> dishDtoPage = new Page<>();

        //条件构造器
        LambdaQueryWrapper<Dish> queryWrapper = new LambdaQueryWrapper<>();
        //添加过滤条件
        queryWrapper.like(name != null,Dish::getName,name);
        //添加排序条件
        queryWrapper.orderByDesc(Dish::getUpdateTime);

        //执行分页查询
        dishService.page(pageInfo,queryWrapper);

        //对象拷贝   忽略records 属性的值不拷贝
        BeanUtils.copyProperties(pageInfo,dishDtoPage,"records");

        List<Dish> records = pageInfo.getRecords();

        List<DishDto> list = records.stream().map((item) -> {
            DishDto dishDto = new DishDto();

            BeanUtils.copyProperties(item,dishDto);

            Long categoryId = item.getCategoryId();//分类id
            //根据id查询分类对象
            Category category = categoryService.getById(categoryId);

            if(category != null){
                String categoryName = category.getName();
                dishDto.setCategoryName(categoryName);
            }
            return dishDto;
        }).collect(Collectors.toList());

        dishDtoPage.setRecords(list);

        return R.success(dishDtoPage);
    }

    /**
     * 根据id查询菜品信息和对应的口味信息
     * @param id
     * @return
     */
    @GetMapping("/{id}")
    public R<DishDto> get(@PathVariable Long id){

        DishDto dishDto = dishService.getByIdWithFlavor(id);

        return R.success(dishDto);
    }

    /**
     * 修改菜品
     * @param dishDto
     * @return
     */
    @PutMapping
    public R<String> update(@RequestBody DishDto dishDto){
        log.info(dishDto.toString());

        dishService.updateWithFlavor(dishDto);
        // 获得所有的key
       // Set keys = redisTemplate.keys("dish_*");
        // 清理所有菜品缓存
        // redisTemplate.delete(keys);

        // 清理某个分类下面的缓存
        String key = "dish_" + dishDto.getCategoryId() + "_1 ";
        redisTemplate.delete(key);
        return R.success("修改菜品成功");
    }

    /**
     *  根据category 分类id 查找当前分类下面的菜品
     * @param dish
     * @return http://localhost:8080/dish/list?categoryId=1397844263642378242
     */
    // http://localhost:8080/dish/list?categoryId=1397844263642378242
//    @GetMapping("/list")
//    public R<List<Dish>> list(Dish dish){
//        log.info("dishController  list() dish = {}",dish);
//        LambdaQueryWrapper<Dish> queryWrapper = new LambdaQueryWrapper<>();
//        queryWrapper.eq(Dish::getCategoryId,dish.getCategoryId());
//        List<Dish> list = dishService.list(queryWrapper);
//        return R.success(list);
//    }

    @GetMapping("/list")
    public R<List<DishDto>> list(Dish dish){
        List<DishDto> dishDtoList = null;
        // 设置key
        String key = "dish_" + dish.getCategoryId() + "_" +  dish.getStatus();
        // 先从redis 中获取数据
        dishDtoList = (List<DishDto>) redisTemplate.opsForValue().get(key);
        if (dishDtoList != null) {
            // 如果存在 则直接从redis 中获取，直接返回，无需查询数据库
            return R.success(dishDtoList);
        }
        // 不存在则 去查询数据库，然后把查询出来的数据缓存到redis里面

        //构造查询条件
        LambdaQueryWrapper<Dish> queryWrapper = new LambdaQueryWrapper<>();
        queryWrapper.eq(dish.getCategoryId() != null ,Dish::getCategoryId,dish.getCategoryId());
        //添加条件，查询状态为1（起售状态）的菜品
        queryWrapper.eq(Dish::getStatus,1);

        //添加排序条件
        queryWrapper.orderByAsc(Dish::getSort).orderByDesc(Dish::getUpdateTime);

        List<Dish> list = dishService.list(queryWrapper);

        dishDtoList = list.stream().map((item) -> {
            DishDto dishDto = new DishDto();

            BeanUtils.copyProperties(item,dishDto);

            Long categoryId = item.getCategoryId();//分类id
            //根据id查询分类对象
            Category category = categoryService.getById(categoryId);

            if(category != null){
                String categoryName = category.getName();
                dishDto.setCategoryName(categoryName);
            }

            //当前菜品的id
            Long dishId = item.getId();
            LambdaQueryWrapper<DishFlavor> lambdaQueryWrapper = new LambdaQueryWrapper<>();
            lambdaQueryWrapper.eq(DishFlavor::getDishId,dishId);
            //SQL:select * from dish_flavor where dish_id = ?
            List<DishFlavor> dishFlavorList = dishFlavorService.list(lambdaQueryWrapper);
            dishDto.setFlavors(dishFlavorList);
            return dishDto;
        }).collect(Collectors.toList());


        // 不存在则 去查询数据库，然后把查询出来的数据缓存到redis里面 60 分钟自动清理缓存
        redisTemplate.opsForValue().set(key,dishDtoList,60, TimeUnit.MINUTES);
        return R.success(dishDtoList);
    }

    @DeleteMapping
    public R<String> delete(
            @RequestParam List<Long> ids) {
            log.info("DishContorller delete ids = {}",ids);
            dishService.removeWithFlavor(ids);
        return R.success("删除成功");
    }

    @PostMapping("/status/{status}")
    public R<String> updateStatus(
            @PathVariable int status,
            @RequestParam List<Long> ids
    ){
        log.info("setmealController  status ids = {}，status = {} ",ids,status);
        dishService.updateDishStatus(status,ids);
        return R.success("修改套餐成功");
    }
}
